Lightning Fast Secure Processing

WebM (Open Web Media Video) Converter

Convert your WebM video into high-quality MP4, WebM, animated GIF, or MP3 with 100% Secure processing. No files are uploaded to our servers.

or drag and drop your WebM files here

100% Secure Local Engine • Zero server uploads

Convert To:

GIF FPS:

Popular WebM Conversions

Direct 1-Click Fast Presets

WebM to MP4 Free & Secure WebM to GIF Free & Secure WebM to MP3 Free & Secure

Easy 3-Step Workflow

How to Convert WEBM Video Files Online?

Convert your video files in seconds with zero software installation and 100% Secure local processing.

Select WEBM Video

Click the "Choose WEBM Files" button or drag and drop your WEBM video file into the drop zone.

Configure Target & Settings

Select your output format (MP4, WebM, GIF, MP3). Adjust conversion options, then click "Convert Video".

Instant Secure Download

Once the 100% Secure conversion finishes locally in memory, click "Download MP4" to save your file immediately.

WEBM

WebM Video

Source Format

What is a WEBM file?

WebM is a royalty-free, open media file format designed specifically for the web by Google. Based on the Matroska profile, it delivers high-performance video compression using VP8, VP9, or AV1 video codecs alongside Vorbis or Opus audio.

How to open a WEBM file?

WebM files play natively in modern web browsers (Chrome, Edge, Firefox, Opera) and media players like VLC.

Developer Google LLC

Initial Release May 2010

Audio Support Yes (Opus, Vorbis)

MIME Type video/webm

Supported Output Targets

Recommended Presets

MP4 (Universal Video) Highest Compatibility

Converts WEBM to standard MP4 with universal H.264 video and AAC audio.

WebM (Web Video) Web Streaming

Fast, lightweight web streaming format optimized for Chrome, Firefox, and Edge.

GIF (Animated Looping Image) Social Media

Turn any WEBM video into an animated looping GIF without sound.

MP3 (Audio Extraction) Audio Track

Extract the audio soundtrack from WEBM directly into an MP3 file.

Absolute Privacy Guarantee

Your Videos Never Touch Our Servers

Video files often contain personal moments, family memories, or confidential business recordings. SM Convert processes every video locally using your computer's secure memory and WebAssembly engine. No uploads, zero cloud servers, complete privacy.

100% Client-Side

Executed locally in RAM

Instant Audio Extraction

Extract MP3/WAV in seconds

Unlimited & Free

No subscription fees or quotas

Convert Other Video Formats to MP4

GIF to MP4 MP3 to MP4 MOV to MP4 MKV to MP4 WAV to MP4 AVI to MP4

Frequently Asked Questions (FAQs)

How can I convert videos to MP4 or WebM online?

Simply drag and drop your video file (MOV, MKV, AVI, etc.) into the converter above, choose MP4 or WebM as your output format, and click "Convert Video". The conversion processes locally on your computer with zero server uploads.

How can I extract audio (MP3/WAV) from my video?

Select your video (MP4, MOV, WebM, etc.), choose MP3 or WAV in the format dropdown, and click convert. The audio track is separated and saved locally in seconds.

What is the maximum video file size I can convert?

Because processing runs locally with 100% Secure execution without server uploads, files under 200 MB to 500 MB convert with optimal speed and performance depending on your device's available RAM.

Are my video files stored on any cloud server?

Never. Your video files are processed strictly inside your device's secure memory using WebAssembly and Web Audio APIs. They are never transmitted over the internet or saved to any external hard drives.